12125638 has 12 divisors (see below), whose sum is σ = 21158172. Its totient is φ = 5196660.

The previous prime is 12125609. The next prime is 12125647. The reversal of 12125638 is 83652121.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61768 + ... + 61963.

It is an arithmetic number, because the mean of its divisors is an integer number (1763181).

Almost surely, 2^12125638 is an apocalyptic number.

12125638 is a deficient number, since it is larger than the sum of its proper divisors (9032534).

12125638 is a wasteful number, since it uses less digits than its factorization.

12125638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123747 (or 123740 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 12125638 is about 3482.1886795520. The cubic root of 12125638 is about 229.7390739818.

Adding to 12125638 its reverse (83652121), we get a palindrome (95777759).

The spelling of 12125638 in words is "twelve million, one hundred twenty-five thousand, six hundred thirty-eight".